[rfc 07/13] [RFC 07/13] IPVS: ip_vs_{un,}bind_scheduler NULL arguments

[Simon Horman <horms@xxxxxxxxxxxx>]

In general NULL arguments aren't passed by the few callers that exist,
so don't test for them.

The exception is to make passing NULL to ip_vs_unbind_scheduler() a noop.

Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
---
 net/netfilter/ipvs/ip_vs_ctl.c   |    3 +--
 net/netfilter/ipvs/ip_vs_sched.c |   23 +++--------------------
 2 files changed, 4 insertions(+), 22 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 84dae47..d57cc4a 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c
@@ -1229,8 +1229,7 @@ ip_vs_add_service(struct ip_vs_service_user_kern *u,
 
  out_err:
        if (svc != NULL) {
-               if (svc->scheduler)
-                       ip_vs_unbind_scheduler(svc);
+               ip_vs_unbind_scheduler(svc);
                if (svc->inc) {
                        local_bh_disable();
                        ip_vs_app_inc_put(svc->inc);
diff --git a/net/netfilter/ipvs/ip_vs_sched.c b/net/netfilter/ipvs/ip_vs_sched.c
index cd77902..be0780a 100644
--- a/net/netfilter/ipvs/ip_vs_sched.c
+++ b/net/netfilter/ipvs/ip_vs_sched.c
@@ -46,15 +46,6 @@ int ip_vs_bind_scheduler(struct ip_vs_service *svc,
 {
        int ret;
 
-       if (svc == NULL) {
-               pr_err("%s(): svc arg NULL\n", __func__);
-               return -EINVAL;
-       }
-       if (scheduler == NULL) {
-               pr_err("%s(): scheduler arg NULL\n", __func__);
-               return -EINVAL;
-       }
-
        svc->scheduler = scheduler;
 
        if (scheduler->init_service) {
@@ -74,18 +65,10 @@ int ip_vs_bind_scheduler(struct ip_vs_service *svc,
  */
 int ip_vs_unbind_scheduler(struct ip_vs_service *svc)
 {
-       struct ip_vs_scheduler *sched;
+       struct ip_vs_scheduler *sched = svc->scheduler;
 
-       if (svc == NULL) {
-               pr_err("%s(): svc arg NULL\n", __func__);
-               return -EINVAL;
-       }
-
-       sched = svc->scheduler;
-       if (sched == NULL) {
-               pr_err("%s(): svc isn't bound\n", __func__);
-               return -EINVAL;
-       }
+       if (!sched)
+               return 0;
 
        if (sched->done_service) {
                if (sched->done_service(svc) != 0) {
-- 
1.7.1


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